Lifting heavy rocks already has a hard strength requirement in BG3. So everyone who are saying "8 strength isn't weak" or "everything needs to be possible for everyone", do you think these should also be a d20 roll?
Lifting heavy rocks perfectly fells under lift and carry rules, while your examples from opening post do not (and I already wrote why above).
If you don't think 8 strength is weak (average commoner who doesn't train has 10-11), do you also think 8 wisdom isn't foolish and 8 dex isn't clumsy? You can have no negative effects from negative modifiers? What's the point of having a weak character if they can still perform feats of brute strength successfully with merely 20% less chance than the strongest character?
those 8 and 8 are just slightly lower than average for a person from Forgotten realms.
And now let's pay attention to math here:
Carrying Capacity. Your carrying Capacity is your Strength score multiplied by 15. This is the weight (in pounds) that you can carry, which is high enough that most Characters don’t usually have to worry about it.
8 strength character can carry ~50 kilograms. And here:
Push, Drag, or Lift. You can push, drag, or lift a weight in pounds up to twice your carrying Capacity (or 30 times your Strength score). While pushing or dragging weight in excess of your carrying Capacity, your speed drops to 5 feet.
8 strength character can push, drag or lift ~100 kilograms.
That doesn't sound as an average Earth human to me. Welcome to the world of High Fantasy, forget about normal humans.
